Meessen, Brunovan Heteren, GodelieveSoeters, RobertFritsche, Gyurivan Damme, Wim2015-12-042015-12-042012-10Bulletin of the World Health Organizationhttps://hdl.handle.net/10986/23225A forthcoming report by the World Health Organization (WHO) on evidence for policy is already fuelling passionate debate, especially among scientists. Opinions are divided: some scientists believe strongly in the systematic assessment of evidence on the effectiveness of health system interventions and reforms; others are skeptical. This is not just another academic debate. Health policy is a noisy field involving many stakeholders. Health reform approaches that seem promising in practice are assessed critically by institutional researchers, whose methodological dictums are sceptically received by field practitioners.en-USCC BY 3.0 IGOhealth system reformJournal ArticleWorld Bank10.1596/23225